static cast on MPI to ensure correct mem address

artis-mcrt · Apr 25, 2024 · bbfffe3 · bbfffe3
1 parent 9f405f8
commit bbfffe3
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/radfield.cc b/radfield.cc
@@ -1349,8 +1349,8 @@ void do_MPI_Bcast(const int modelgridindex, const int root, int root_node_id)
 
   if constexpr (DETAILED_BF_ESTIMATORS_ON) {
     if (globals::rank_in_node == 0) {
-      MPI_Bcast(&prev_bfrate_normed[nonemptymgi * globals::bfestimcount], globals::bfestimcount, MPI_FLOAT,
-                root_node_id, globals::mpi_comm_internode);
+      MPI_Bcast(&prev_bfrate_normed[static_cast<size_t>(nonemptymgi) * static_cast<size_t>(globals::bfestimcount)],
+                globals::bfestimcount, MPI_FLOAT, root_node_id, globals::mpi_comm_internode);
     }
   }